哈勃的可加光图片(橙色)展示了每个星系里恒星的发光。
Hubble's optical light images (orange) show the glow from the stars in each galaxy.
研究人员运用这个技术用在425个人的身上，给每人的膝盖拍下了4张X光图片用来测试。
The researchers tested the technique on 425 people, who each had four X-rays taken of their knees.
哑铃星云，也称梅西耶27，在美国宇航局斯必泽空间望远镜拍摄的这张图片中，发出红外光。
The Dumbbell Nebula, also known as Messier 27, pumps out infrared light in this image from NASA's Spitzer Space Telescope.
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